J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange B_03 01 12 NJ DEP 2-hrNJDEP Rainfall=1.25" Prepared by TRC Engineers, Inc. HvdroCAD® 9,10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 77 Summary for Link 3L: to MH D Inflow Area = Inflow = Primary = 2.316 ac, 21.40% Impervious, Inflow Depth = 0.46" for NJDEP event 1.71 cfs@ 1.25 hrs, Volume= 0.089 af 1.71 cfs @ 1.25 hrs, Volume= 0.089 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Link 3L: to MH D Hydrograph I 11111 ■ Inflow | ■ Primary | 1 71 r.fsj 71 cfs Inflow Area i1 0 1 2 3456 7 3 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) .316 ac

Post Development West Orange B_03 01 12 NJ DEP 2-hrNJDEP Rainfall=1.25" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 78 Summary for Link 4L: to MH 11 Inflow Area = Inflow = Primary = 5.076 ac, 24.87% impervious, Inflow Depth = 4.12 cfs @ 1.14 hrs, Volume= 4.12 cfs @ 1.14 hrs, Volume= 0.40" for NJDEP event 0.171 af 0.171 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Link 4L: to MH 11 Hydrograph "i—i—r A I Inflow j Primary 4 1? rfs 12 Cfs Inflow Area=5 076 ac E2 i— r ~ 7 —i 01 23456 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i— r - i - •}

-H> /VH-I l\ Link from Part 8 MH-11 to\lH-0 P<*“DA8 POOR 7 Link from Part 8 A—> A MH 12/o Div Chamber Diversion Chamber to Aqua-Swirl A PO-DaV 1R ,1 Swale PO-OAi DA 1 MH-16 to 08 »1 ./^h\ MHItoMH 12 MH G lo MH H 0 > /CB Link from Part A #1 Analysis Point A .2 ->O DA 2 Subcat / Reach Link Drainage Diagram for Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc., Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC

Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 2 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Pipe Listing (all nodes) Line# 1 2 3 4 5 6 7 8 9 10 Node Number 2 CB 1 Div Chamber MH 12 MH G MH H MH I MH-11 MH-14 MH-D In-Invert (feet) Out-Invert (feet) Length (feet) Slope (ft/ft) n Diam/Width (inches) Height (inches) Fill (inches) 0.00 576.00 591.60 591.70 598.50 597.00 595.50 592.80 588.00 592.70 0.00 574.00 588.00 591.60 597.50 595.50 594.50 592.70 576.00 591.70 190.0 90.0 88.0 10.0 159.0 154.0 91.0 7.0 174.0 90.0 0.0100 0.0222 0.0409 0.0100 0.0063 0.0097 0.0110 0.0143 0.0690 0.0111 0.013 0.011 0.020 0.020 0.020 0.020 0.020 0.020 0.020 0.020 24.0 24.0 30.0 30.0 12.0 12.0 12.0 30.0 30.0 30.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 3 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PO-DA 1 0.203 af, Depth= 1.83" 1.92 cfs @ 12.25 hrs, Volume= Runoff Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" CN 98 79 78 83 79 98 Area (sf) 11,168 38,971 8,088 58,227 47,059 11,168 * Tc (min) 16.9 Length (feet) 150 1.3 270 18.2 420 Description Impervious, HSG D Woods/grass comb., Good, HSG D Meadow, non-qrazed, HSG D Weighted Average 80.82% Pervious Area 19.18% Impervious Area Slope Velocity Capacity Description (cfs) (ft/ft) (ft/sec) Sheet Flow, 0.15 0.0270 Grass: Dense n= 0.240 P2= 3.42" Shallow Concentrated Flow, 3.42 0.0520 Grassed Waterway Kv= 15.0 fps Total Subcatchment 1: PO-DA 1 Hydrograph __J .L l 1.92 cfs Type III 24-hr 2 yr Rainfall=3.42' Runoff Area=58,227 sf % Runoff Volume=0.203 af % o 1- Runoff Depth=1.83' Flow Length=420' Tc=18.2 min CN=79/98 0 1 2 3 4 56 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. HydroCAD® 9.10 sIn 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 4 n Summary for Subcatchment 2: PO-DA 2 Runoff = 0.83 cfs @ 12.25 hrs, Volume= 0.084 af, Depth= 1.50" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" * * * Area (sf) CN Description 98 Impervious, HSG D 0 0 98 Gravel road, HSG D 9,261 80 Grass, Good, HSG D 19,890 78 Meadow, non-grazed, HSG D 29,151 79 Weighted Average 29,151 79 100.00% Pervious Area Tc (min) 12.1 Length (feet) 120 Slope (ft/ft) 0.0400 Velocity (ft/sec) 0.17 0.3 75 0.0600 3.67 Grass: Dense n= 0.240 P2= 3.42" • • ■ Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 1.9 140 0.0070 1.25 Shallow Concentrated Flow, 1.2 130 0.0150 1.84 Shallow Concentrated Flow, 1.7 360 0.0540 3.49 Shallow Concentrated Flow, 0.4 190 0.0100 7.20 Capacity (cfs) Description Sheet Flow, Grassed Waterway Kv= 15.0 fps Grassed Waterway Kv= 15.0 fps Grassed Waterway Kv= 15.0 fps .* 17.6 1,015 Total 22.62 • i' % Pipe Channel, Culvert to Discharge 24.0" Round Area= 3.1 sf Perim= 6.3’ r= 0.501 n= 0.013 Corrugated PE, smooth interior ; •< , 1 J

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 5 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Subcatchment 2: PO-DA 2 Hydrograph h—r I7 0.9 !-- 1------ r ! 0.83 cfs | 0.85 0.8 - 4- - 4 - Type III 24-hr 2 yr _ l. _ a _ 0.75 Rainfall=3.42" 0.7 U_1_J. 1 0.65 RunoffA rea=29,151 sf 0.6 Runoff Volume=0.084 af _ 0.55 o. 0-5 Runoff Depth=1.50' 3 0.45 o Cl 0.4 Flow Length-1,015’ •r-7• 0.35 * 0.3 Tc=17.6 min r*t■ - t--- i ■ CN=79/0 0.25 0.2 0.15 0.1 0.05 0 rm 01 23456789 11'i i |‘it rqn PHTTHTTrn 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 6 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Subcatchment 7: PO-DA 7 Runoff = 3.78 cfs @ 12.11 hrs, Volume= 0.289 af, Depth= 1.61" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" Area (sf) CN Description 1,868 98 Impervious, HSG D 85 Yard stone, HSG D 14,410 80 Grass , Good, HSG D 72,265 73 Brush, Good, HSG D 5.406 93,949 81 Weighted Average 92,081 80 98.01 % Pervious Area 1,868 98 1.99% Impervious Area * * * Tc (min) 4.5 Length (feet) 70 Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.1600 0.26 Description Sheet Flow, Grass: Dense n= 0.240 P2= 3.42" 0.8 70 0.0857 Shallow Concentrated Flow, 1.46 Woodland Kv= 5.0 fps 2.4 310 Shallow Concentrated Flow, 0.0200 2.12 Grassed Waterway Kv= 15.0 fps 7.7 450 Total Subcatchment 7: PO-DA 7 Hydrograph i—r 3.78 cfs r~U7T\ iii J Type III 24-hr 2 yr i Rainfall=3.42" Runoff Area=93,949 sf Runoff Volume=0.289 af «J2 o, Runoff Depth=1,61" o5 *2- Flow Length~450' Tc=7.7 min L_J m/mw//mmm 0 1 2 3 4 5 6 7 8 CN=80/98 m/mm/ 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 7 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Subcatchment 8: PO-DA 8 Runoff = 0.62 cfs @ 12.43 hrs, Volume= 0.086 af, Depth= 2.79" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" * * Area (sf) CN Description 98 Impervious, HSG D 10,980 85 Yard stone, HSG D 5,243 94 Weighted Average 16,223 85 32.32% Pervious Area 5,243 98 67.68% Impervious Area 10,980 Tc (min) 30.5 Length (feet) 100 1.2 80 0.0030 31.7 180 Total Slope Velocity Capacity (ft/ft) (ft/sec) (cfs) 0.0030 0.05 1.11 Description Sheet Flow, Yard Stone n= 0.250 P2= 3.42" Shallow Concentrated Flow, Paved Kv= 20.3 fps Subcatchment 8: PO-DA 8 Hydrograph 0.62 0 65 0.6 Type III 24-hr 2 yr 0 55 Rainfa!l=342' 0.5 Runoff Area=16,223 sf 0.45 Runoff Volume=0.086 af 04 Runoff Depth=2.79" 0.35 0.3 Flow Length=180’ 0 25 Slope=0.0030 V 02 Tc=31.7 min -4- 0.15 ; — 0.1 0.05 rjrr 0 1 2 34 56 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i i CN=85/98

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 HvdroCAD® 9.10 s/n 06401 ©2009 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 9B: PO-DA 9B 0.188 af, Depth= 2.29" 1.66 cfs @ 12.30 hrs, Volume= Runoff = Runoff by SCS TR-20 method, UH=SCS, Split Pervious/lmperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" Area (sf) CN Description 5,504 98 Impervious, HSG D 98 Gravel road, HSG D 6,361 85 Yard stone, HSG D 30,963 42,828 89 Weighted Average 30,963 72.30% Pervious Area 85 11,865 27.70% Impervious Area 98 * * * Tc (min) 19.6 Length (feet) 100 1.9 150 0.0066 21.5 250 Total Slope Velocity Capacity (cfs) (ft/ft) (ft/sec) 0.08 0.0090 Description Sheet Flow, Yard Stone n= 0.250 P2= 3.42" Shallow Concentrated Flow, Yard Stone 1.31 Unpaved Kv= 16.1 fps Subcatchment 9B: PO-DA 9B 1.C o> Hydrograph i 1 1 i Type III 24-hr 2 yr I i Rainfall=3.42" lunoff Area=42,828 sf Sunoff; Volume=0.188; af •a u Runoff Depth=2.29" 5 2 Flow Length^SO' Tc=21L5 min ; CN=85/98 0- <$$$$$%* |l ll l| i l l i |l n || n u || n U n n |iu i| n u |l i i i | ' i m |l u i | .................................................. 11 0 1 2 34 56 78 ' . I n n I ' nifu n |i 1 1 1 pi n .............................. ............................ m I p m 1 111 11 11 111 11 11 | l 1 1 1| 1 11 11 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)